Intro to Myology Flashcards
Muscles move the body by either ____, or ____.
Making the muscle move or allowing it to
What connects muscles to bones?
Tendons
The connection between a muscle and a tendon is called…
Musculotendinous junction (MTJ)
The connection between a tendon and a bone is called…
Tendoperiosteal junction
What is the belly of the muscle?
The central portion of the muscle
What is the head of the muscle?
one of two (at least) extensions from a muscle belly.
What is a concentric contraction?
- tension is greater than the resistance
- undergoes shortening
When two attachments become closer together, it is a ____ contraction.
Concentric
What is an isometric contraction?
-muscle contracts against a resistance with no visible change in the muscle length
When two attachments are neither pulled together, or drawn apart, it is undergoing a ___ contraction.
Isometric
What is an eccentric contraction?
- when a muscle is generating a force, but is unable to overcome it
- undergoes lengthening
When two muscle attachments are moving away from each other, it is an ___ contraction.
Eccentric
This contraction is used to control movements or to act as a brake to movement.
Eccentric
The attachment that is fixed is known as ___
the origin
The attachment that is moving is known as ___
the insertion
What can be used as a reference to a fixed attachment?
proximal/distal, superior/inferior, medial/lateral, anterior/posterior
The primary muscle causing the desired movement is called ______.
Ex. Quads for knee extension
Ex. Hamstrings for flexion of the knee
Prime Mover
The muscle that opposes a specific action is the _____.
Antagonist
What are stabilizers?
Muscles that stabilize the more proximal joints during actions of more distal joints.
What are synergists?
The muscles that work to assist the prime mover in a given action
If there is a problem with the agonist or it needs extra assistance, ____ kicks in.
Synergists
What is fascia?
Connective tissue that runs through the body
What does fascia do?
Provides structure and support.
This is a connective tissue that invests throughout the thigh and surrounds the thigh muscle in a dense tubular sheath.
Fascia Lata: Fascia of the thigh
Gerdy’s tubercle A.K.A
Lateral Tibial Tubercle
______ is a very strong part of the fascia lata that thickens laterally
Iliotibial Band (IT band)
Where does the IT band attach?
superiorly to the tubercle of the iliac crest and inferiorly to Gerdy’s tubercle and the patella.
